(X + 3)^2
(-3 + x)^2
(xy + bc)^2
(2 - x)^2
(5-x)(5+x)
(x + y)(x - y)
(x - 5)^2
x^2-4x+4
25-x^2
x^2-6x+9
x^2+6x+9
x^2-10x+25
x^2 - y^2
x^2y^2+2xybc+b^2c^2
